"In my case jitter behaviour of MTK doesn't depend on firmware version and mode. I've done clean experiment just walking around with armed quad and then analysed log files (2.6 and 2.7.1). I see ~3.5 Hz "stairs" in raw GPS…"
Anton Stuk's Discussions
APM 2.0 MTK GPS Noisy readings
Started this discussion. Last reply by Max Turnoff Sep 1, 2012. 8 Replies 1 Like
Hi,in the last few test flights I noticed strange quadcopter behavior in gps-dependant modes (loiter, position hold, rtl). after brief investigation the problem was found - turns out gps output…Continue
Tags: AP_LeadFilter, mtk, gps
Anton Stuk's Page
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Anton Stuk replied to Andreas M. Antonopoulos's discussion ArduCopter 2.7.1 Released"From what I see in source code its not currently supported. (AP_AHRS_MPU6000.h)"
Anton Stuk replied to Anton Stuk's discussion APM 2.0 MTK GPS Noisy readings"OK, I see what the original developer just made a changes to the not yet released version (2.7.3 perhaps) which will help with (/ hide) this particular issue in question."
Anton Stuk replied to Anton Stuk's discussion APM 2.0 MTK GPS Noisy readings"Hi,
im not really an expert, but judging from your gpx track its looks pretty much the same problem. (the telemetry logs are essentially empty btw).
Well, what I did is just disabled a gps-lag compensation, which was introduced in 2.7 and…"
omgmayday replied to Anton Stuk's discussion APM 2.0 MTK GPS Noisy readings"Did you fixed it? I think Im having same issue.
Can anyone take a look to my logs to see what is wrong?
"
Anton Stuk replied to Anton Stuk's discussion APM 2.0 MTK GPS Noisy readings"Updated to 2.7.1 - voila, back to the strange jitter."
Anton Stuk replied to Anton Stuk's discussion APM 2.0 MTK GPS Noisy readings"Ok, ArduCopter 2.6 fw got no problem. GPS readings are smooth and clean."
Anton Stuk replied to Anton Stuk's discussion APM 2.0 MTK GPS Noisy readings"Thanks for heads-up! I will test 2.5-2.7 fw versions to see if its really a software problem."
John Mulligan replied to Anton Stuk's discussion APM 2.0 MTK GPS Noisy readings"
I noticed this too , seems to be a 2.7 change , I assume having to do with gps code for new ublox
this should be posted in the multicopter forum
"
Anton Stuk posted a discussionAPM 2.0 MTK GPS Noisy readings
Hi,in the last few test flights I noticed strange quadcopter behavior in gps-dependant modes (loiter, position hold, rtl). after brief investigation the problem was found - turns out gps output became very noisy compared to the previously logged flights. However I still cant figure out why it happened at the first place?The only changes made to the quad was frame structure upgrade, but none whatsoever modifications in electronics or even relative components position. Also upped arducopter to…See More
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